Apply batched suggestions from code review

Co-authored-by: Petr Viktorin <encukou@gmail.com>

Author: cmaloney

Tools/clinic/libclinic/clanguage.py

@@ -387,7 +387,7 @@ def render_function(
             vc_impl_args = [vc_first] + data.impl_arguments[1:]
             template_dict['vectorcall_impl_arguments'] = ", ".join(vc_impl_args)
         else:
-            template_dict['vectorcall_impl_arguments'] = ""
+            pass
 
         template_dict['return_conversion'] = libclinic.format_escape("".join(data.return_conversion).rstrip())
         template_dict['post_parsing'] = libclinic.format_escape("".join(data.post_parsing).rstrip())

Tools/clinic/libclinic/function.py

@@ -149,7 +149,7 @@ def c_basename_vectorcall(self) -> str:
         name = self.c_basename
         for suffix in ('___init__', '___new__', '_new', '_init'):
             if name.endswith(suffix):
-                name = name[:-len(suffix)]
+                name = name.removesuffix(suffix)
                 break
         return f'{name}_vectorcall'